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Basic motionlogger

Manufactured by Ambulatory Monitoring

The Basic Motionlogger is a compact and lightweight activity monitoring device designed for collecting data on human motion and movement. It measures and records various parameters related to physical activity, including acceleration, orientation, and movement patterns. The device is intended for use in research, clinical, and other applications where objective data on an individual's physical activity is required.

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4 protocols using basic motionlogger

1

Postpartum Sleep-Wake Patterns Assessed by Actigraphy

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Objective sleep-wake patterns were measured by 72 hour wrist actigraphy (Basic Motionlogger®, Ambulatory Monitoring Inc.) at six weeks postpartum. The timing of actigraphy was selected to give participants time to begin to apply the intervention to their lives. Actigraphy data were collected during weekdays, and participants kept sleep diaries. Sleep diaries included bed and rise times, perceived awakenings, actigraph removal, daytime naps, use of bedroom TV, fan, disturbing noises, and bed-sharing (Table 1). Selected outcome variables included total sleep time after sleep onset and sleep maintenance (i.e., percent of time spent asleep after sleep onset).
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2

Measuring Children's Physical Activity

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An actigraph is an acceleration-sensitive device that measures motor activity. The estimated reliability for actigraphs placed at the same site on the same person ranges from .90 to .99 (Tryon, Pinto, & Morrison, 1991 ). Basic Motionlogger® (Ambulatory Monitoring, 2014) actigraphs were used to measure children’s activity level. The acceleration-sensitive devices resemble wristwatches and were set to Proportional Integrating Measure (low-PIM) mode, which measures the intensity of movement (i.e., quantifies gross activity level). Movement was sampled 16 times per second (16 Hz) and collapsed into 1-s epochs. Children were told that the actigraphs were “special watches” that let them play the computer learning games. Observer XT (Noldus, 2014) software was used to code start and stop times for each task, which were matched to the time stamps from the actigraphs. Actigraphs were placed on the child’s non-dominant wrist and both ankles (i.e., 3 actigraph scores per child per task).
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3

Multidimensional Actigraph Monitoring of Child Movement

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Basic Motionlogger® (Ambulatory Monitoring, Inc., 2014)
actigraphs are acceleration-sensitive devices that sample movement intensity
16 times per second (16 Hz), collapsed into 1-second epochs. The estimated
reliability for actigraphs placed at the same site on the same person ranges
from .90 to .99 (Tryon et al., 1991 ).
Children were told that the actigraphs were “special
watches” that let them play the computer learning games. Observer XT
(Noldus, 2014) software was used to code start and stop times for each task,
which were matched to the time stamps from the actigraphs. Actigraphs were
placed on the child’s non-dominant wrist and both ankles using
Velcro watch bands. Different from previous studies, a fourth actigraph was
attached to the back of the 4-caster swivel chair to capture gross motor
movement not collected by children’s extremities.
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4

Actigraphy Measures in Vulnerable Populations

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Participants wore wrist actigraphs for a 72 hour weekday period during weeks 4 and 8. (Basic Motionlogger®, Ambulatory Monitoring Inc.). Data analysis was supported by participant sleep diaries. Select actigraphy variables include nighttime sleep time (total minutes of sleep after sleep onset), time awake after sleep onset, and the longest period of uninterrupted nighttime sleep. Although 119 participants completed both actigraph recordings, there was about a 15% loss of data with complete data available for 102 (week 4) and 99 (week 8) participants. Reasons for data loss in our sample included actigraph malfunction, forgetting to replace actigraph after temporary removal, and insufficient sleep diary data. Some of the reasons for actigraph non-use reflect the vulnerability of this population; one participant wrote that she was too distressed to wear it, because her partner going to prison for 4 years that day; another participant’s actigraph fell off and onto the ground during a physical assault by a past partner; and one participant’s infant died suddenly and unexpectedly.
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